Initial commit

1 files changed, 52 insertions, 0 deletions

diff --git a/sys/ki/kfsubd.x b/sys/ki/kfsubd.x
new file mode 100644
index 00000000..93f2d655
--- /dev/null
+++ b/sys/ki/kfsubd.x
@@ -0,0 +1,52 @@
+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+include	"ki.h"
+
+# KFSUBD -- Compute the net pathname of a subdirectory given the net pathname
+# of the parent directory and the name of the subdirectory (the logical
+# subdirectory names . and .. are supported).  If the subdirectory resides on
+# the local node we call the local kernel to compute the new directory pathname.
+# If the directory resides on a remote node we merely append to the virtual
+# pathname, leaving resolution of the final pathname to the remote kernel when
+# the file is referenced at runtime.
+
+procedure kfsubd (osdir, maxch, subdir, nchars)
+
+char	osdir[maxch]		#RW net pathname of directory
+int	maxch			#RO max chars out in osdir string
+char	subdir[ARB]		#RO receives pathname
+int	nchars			#WO receives length of osfn string
+
+int	delim, op
+char	alias[SZ_ALIAS]
+int	ki_gnode(), gstrcat()
+
+begin
+	if (ki_gnode (osdir, alias, delim) == LOCAL) {
+	    # Directory is on the local node.
+
+	    if (osdir[delim+1] == EOS) {
+		call zfgcwd (osdir[delim+1], maxch - delim, nchars)
+		if (nchars == ERR)
+		    return
+		call strupk (osdir[delim+1], osdir[delim+1], maxch-delim)
+	    }
+	    call zfsubd (osdir[delim+1], maxch - delim, subdir, nchars)
+	    if (nchars != ERR)
+		nchars = nchars + delim
+
+	} else {
+	    # File is on a remote node.  Do not map the filename; leave that
+	    # to the kernel when the file is referenced at runtime.  The OSDIR
+	    # string is assumed to be a concatenatable VFN (with node prefix).
+
+	    op = gstrcat (subdir, osdir, maxch) + 1
+	    if (op > 1 && osdir[op-1] != '/') {
+		osdir[op] = '/'
+		op = op + 1
+		osdir[op] = EOS
+	    }
+
+	    nchars = op - 1
+	}
+end